Unit 4 8th Grade Full Review

Front

What is an Exothermic Reaction?

Back

A chemical reaction that releases heat, resulting in an increase in temperature of the surroundings.

Front

What is an Endothermic Reaction?

Back

A chemical reaction that absorbs heat, resulting in a decrease in temperature of the surroundings.

Front

What is a Chemical Change?

Back

A change that results in the formation of new chemical substances, often indicated by color change, gas production, or temperature change.

Front

What is a Physical Change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is an Ionic Bond?

Back

A type of chemical bond formed between a metal and a nonmetal, characterized by the transfer of electrons.

Front

What is a Covalent Bond?

Back

A type of chemical bond formed between two nonmetals, characterized by the sharing of electrons.

Front

What are the signs of a Chemical Change?

Back

Signs include color change, gas production (bubbles), temperature change, and the formation of a precipitate.

Front

What is the difference between a Physical Change and a Chemical Change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

Front

What happens to temperature during an Exothermic Reaction?

Back

The temperature of the surroundings increases as heat is released.

Front

What happens to temperature during an Endothermic Reaction?

Back

The temperature of the surroundings decreases as heat is absorbed.